Retrieves a list of external calendar connections.
You can filter by schedule ID (SDK | REST).
By default, the call fails if details for at least 1 connection can't be
retrieved from the external provider. However, you can specify
{"partialFailure": true} to allow the call to succeed, if details for at
least 1 connection can be retrieved.
You can only call this method when authenticated as a Wix app or Wix user identity.
This method doesn’t return any custom errors, but may return standard errors. Learn more about standard Wix errors.